<template>
  <view class="viewport">
    <view class="cover">
      <image :src="banner" />
    </view>
    <view class="tabs">
      <text
        class="text"
        :class="{ active: item.id === activeId }"
        @click="activeId = item.id"
        v-for="item in subTypes"
        :key="item.id"
      >
        {{ item.title }}
      </text>
    </view>

    <scroll-view
      scroll-y
      class="scroll-view"
      v-for="(value, key) in goodsItems"
      :key="key"
      v-show="activeId === key"
      @scrolltolower="loadMore"
    >
      <view class="goods">
        <navigator
          hover-class="none"
          class="navigator"
          v-for="goods in value.items"
          :key="goods.id"
          :url="`/pages/goods/index?id=${goods.id}`"
        >
          <image class="thumb" :src="goods.picture"></image>
          <view class="name ellipsis">{{ goods.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
          </view>
        </navigator>
      </view>
      <view class="loading" v-if="pageInfo.page > pageInof.pages"
        >没有更多数据了</view
      >
      <view class="loading" v-show="loading">...加载中...</view>
    </scroll-view>
  </view>
</template>
<script>
import { getRecommendAPI } from "@/api/home";

const urlMap = {
  1: { title: "特惠推荐", url: "/home/preference/mutli" },
  2: { title: "爆款推荐", url: "/home/inVogue/mutli" },
  3: { title: "一站买全", url: "/home/oneStop/mutli" },
  4: { title: "新鲜好物", url: "/home/new/mutli" },
  5: { title: "新鲜好物", url: "/home/new/mutli" },
};
export default {
  data() {
    return {
      banner: "",
      goodsItems: [],
      subTypes: [],
      activeId: "",
      loading: false,
    };
  },

  computed: {
    pageInfo() {
      if (!this.activeId) return { page: 1, pages: 1 };
      return {
        page: this.goodsItems[this.activeId].page,
        pages: this.goodsItems[this.activeId].pages,
      };
    },
  },
  methods: {
    async loadMore() {
      const currentItem = this.goodsItems[this.activeId];
      if (currentItem.page > currentItem.pages) return;

      if (this.loading) return;
      this.loading = true;

      const { result } = await getRecommendAPI(
        this.currentItem.url,
        this.activeId,
        this.pageInfo.page + 1
      );
      const { goodsItems } = result;
      const { items, page, pages } = goodsItems[this.activeId];
      this.goodsItems[this.activeId].items.push(...items);
      this.goodsItems[this.activeId].page = page;
      this.goodsItems[this.activeId].pages = pages;

      this.loading = false;
    },
    async loadData() {
      const { result } = await getRecommendAPI(this.currentItem.url);
      this.banner = result.bannerPicture;
      this.goodsItems = result.goodsItems;
      this.subTypes = result.subTypes;
      this.activeId = result.subTypes[0].id;
    },
  },
  onLoad({ type }) {
    this.currentItem = urlMap[type];
    uni.setNavigationBarTitle({ title: this.currentItem.title });
    this.loadData();
  },
};
</script>

<style lang="scss">
page {
  height: 100%;
  background-color: #f4f4f4;
}
.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}
.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;
  position: absolute;
  left: 0;
  top: 0;
}
.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
  .text {
    margin: 0 20rpx;
    position: relative;
  }
  .active {
    &::after {
      content: "";
      width: 40rpx;
      height: 4rpx;
      transform: translate(-50%);
      background-color: #27ba9b;
      position: absolute;
      left: 50%;
      bottom: 24rpx;
    }
  }
}
.scroll-view {
  flex: 1;
  overflow: hidden;
}
.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
  .navigator {
    width: 345rpx;
    padding: 20rpx;
    margin-top: 20rpx;
    border-radius: 10rpx;
    background-color: #fff;
  }
  .thumb {
    width: 305rpx;
    height: 305rpx;
  }
  .name {
    height: 88rpx;
    font-size: 26rpx;
  }
  .price {
    line-height: 1;
    color: #cf4444;
    font-size: 30rpx;
  }
}
.goods .symbol,
.goods .decimal {
  font-size: 70%;
}
</style>
